I gave to them some chips for decapsulation, and now we have first results.-------------------------------------------------------------------------------------------------------------------------------------------------------------Chips:

UMC UA6527P - Hybrid ("Dendy") CPU made by "UMC". I know it has better DPCM, timbre and overall sound quality than TA-03NP1, but has 25%<->50% duty cycles swappedUMC UA6538 - Hybrid ("Dendy") PPU made by "UMC". I've confirmed red/green emphasis swap on it. It has more saturated palette than TA02-NP-6538 and RP2C07-0.

TA-03NP1-6527P - Hybrid ("Dendy") CPU made by "TA". I know it has worse timbre and buggy DPCM than UMC UA6527P, but has right dutycyclesTA-02NP-6538 - Hybrid ("Dendy") PPU made by "TA". It has red/green emphasis bits also swapped, as well as RP2C07-0 and UA6538.-------------------------------------------------------------------------------------------------------------------------------------------------------------

First photos of UMC UA6538 PPU:METAL LAYER: http://s.zeptobars.ru/UMC-UA6538-HD.jpgIf everything is clear with the current view, and it can be properly reversed, zeptobars will remove metallization layer and go ahead to the polysilicon.

Last edited by Eugene.S on Sat Sep 19, 2015 2:31 pm, edited 16 times in total.

The metal image for that PPU is a bit blurry compared to the image I used for Visual 2C02, but hopefully it should be good enough for tracing, especially since the "core" of the chip seems to be an almost exact clone of the RP2C02, with differences being mostly in the interconnects and the pin drivers.

_________________Quietust, QMT Productions
P.S. If you don't get this note, let me know and I'll write you another.

The metal image for that PPU is a bit blurry compared to the image I used for Visual 2C02, but hopefully it should be good enough for tracing, especially since the "core" of the chip seems to be an almost exact clone of the RP2C02, with differences being mostly in the interconnects and the pin drivers.

Since further steps couldn't be undone, they guy who's doing the work needs absolute approval and confirmation. Your post is one, right?

Seems TXC "developed" first clone-chips itself in late 80s, and it was:MG-P-501 (CPU) photo1MG-P-502 (PPU) photo2I need to find these chips for testing, and make 100% sure about hybrid or ntsc timings they have.I know that some MicroGenius consoles was pure NTSC (6527+6528), but some have (6527P+6538) hybrids.

Piroxilin just confirmed red\green emphasis bits swap on TA-02NP 6538.So, it has same behaviour as RP2C07 and UMC version of hybrid PPU (UA6538). I guessed famiclone chips was RP2C07 copied, + timings adjusted to be NTSC/PAL hybrid.

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